Fire-grate.



N0. 654,3l8. Patented July .24, |900.

.1. H. MEHRTENS.

FIRE GRATE.

(Application filed Feb. 12, 1900.) (No Model.)

FFICk JOHANN HEINRICH MEHRTENS, OF IIASPE, GERMANY.

FIRE-G RATE.

SFEGIFICATION forming part of ALetters Patent No. 654,318, dated July 24, 1900.

Application filed February 12, 19u00. Serial No. ,SQ. (No model.) l

.To ctZZ whom it may concern.:

Be it known that I, JOHANN HEINRICH MEHRTENS, engineer, a subject of the King of Prussia, German Emperor, residing at Haspe, Westphalia, in the Empire of Germany, have invented certain new and useful Improvementsin Fire-Grates, of which the following is a specification.

My invention relates to an improved construction of that kind of fire-grates in which the bars are made hollow and have water circulating through them for keeping them cool.

I will describe the said improved. construction with reference to the accompanying drawings, in which- Figure l shows a longitudinal section through the fire-grate. Fig. 2 shows a crosssection of one of the bars. Fig. 3 is a part outer end view, and Fig. 4t a part inner end View.

The improvements consist, first, in the connection of the double collecting-box b with the hollow bars a by means of a single screw; secondly, in a loosely-inserted tubular partition h in the bars for obtaining a definite circulation of water; thirdly, in a readily-de tachable cover n at the end of the grate-bar for rapidly introducing and withdrawing the partition h and at the same time for securing the latter in position, and, fourthly, in one or more hook-shaped ledges or shoulders fr, provided on one side of the collecting-box o for supporting the grate upon a fixed transverse rail 7c.

The water serving to cool the grate-bars enters through the pipe m into the compartment o' of the collecting-boit b. It passes thence through the inlet-pipe cinto the lower part of the gratefbar or. and into the interior of the partition h through the openings h', and after filling the latter' it rises thence into the upper part of the bar a, whereupon it flows downward through the tubular outlet-bolt d into the compartment c of the collecting-box b, and finally it Hows from the latter through the pipe Z.

The tubular bolt CZ, passing through the compartmentc, has its upper threaded end screwed into the grate-bar, while its lower threaded end receives a nut, by which the bar ct is drawn down' tightly to the box b. The inlet-tube e is also secured water-tight in the top of the box o by the screwing up of the nut of bolt d. Y

The walls of the tubular partition lt are very thin and are made of steel preferably drawn in a cold condition. The partition is advantageously made of a wedge-shaped cross-section, as represented in Fig. 2. The partition is provided either below or at the sides with small openings 77, for insuring a permanent filling thereof through the pipe e, or it may be furnished with a sufficiently-large slot extending in the whole length of the partition. It is closed at the front end and provided with a downwardly-projecting stud t', by means of which it is held in its position between the inletpipe e and the outlet-pipe d.

. The cover fn. of the grate-bar facilitates the cleaning of the interior lthereof and the in troduction and withdrawal of the partition 71,. By means of the projectingarm o, cast on or riveted to the cover and extending over the end of the partition h, the cover prevents the latter from being raised.

By supporting the front end of the fire-grate by means of the hook-shaped ledge r, resting upon the transverse bearer'c,a sure and. rapid fitting up of the fire-grate with a suitable inclination toward the iire-bridge` can be effected.

The inner ends of the bars d are supported in a suitable notched transverse bearer s, by raising or lowering which the inclination of the bars can be readily varied, as the box Z9 can freely turn with its ledge r on the bearer 7.a in following the adjustment.

The abovefdescribed improved construction of fire-grate affords the important advantages of greater simplicity and strength of construction, greater eheapness, and perfect working.

I claim-- 1. A hollow grate-bar combined with an inclosed slotted tube, a flanged reservoir communicating with a grate-bar, and a rail engaged by the flanged reservoir, substantially as specified.

2. A hollow grate-bar combined with an inclosed slotted tube, a chambered and flanged reservoir coinmunicatingwith the grate-bar, and a cover having a hoolr that engages the tube, substantially as specified.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JOHANN HEiNRiCH MEHRTENS.

Witnesses:

WOLDEMAR HAUPT, HENRY HAsrEn.

IOO 

